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On October 29, 1857 Frederick Douglass spoke in Oneonta, in southern Otsego County, NY.
The visit appears in few historical sources, no doubt because it was long-held belief that it was not wise to identify Underground Railroad agents or their locations as a precaution against pro-slavery advocates attacking them.
Greater Oneonta Historical Society member Peg Twasutyn located a reference however, in the “Local Matters” column of the Oneonta Herald of Wednesday, October 28, 1857:
“Frederick Douglass is coming and will address the citizens of this town, on the subject of slavery, on Thursday evening, this 29th inst.